TAPPI TIP0402-18 PDF

Ultrasonic testing (UT) for tube thickness in black liquor recovery boilers: Part I – Guidelines for accurate tube thickness testing; Part II – Default layouts for tube thickness surveys in various boiler zones

TAPPI TIP0402-18 – Ultrasonic testing (UT) for tube thickness in black liquor recovery boilers: Part I – Guidelines for accurate tube thickness testing;Part II – Default layouts for tube thickness surveys in various boiler zones

This TIP is a review of general considerations related to UT thickness testing of black liquor recovery boiler tubes:

• Part I of this TIP provides guidelines and procedures for acquiring accurate ultrasonic thickness readings on boiler tubes, where the tube material and condition are conductive to such non-destructive testing.
• Part II describes how tube thickness surveys are commonly laid out for different zones of a typical recovery boiler.It also stresses that a customized survey is essential for each boiler.